JP7481931B2 - Sound insulation wall and sound insulation panel used therein - Google Patents

Description

The present invention relates to a sound insulation wall that blocks noise generated from a noise source, and a sound insulation panel used therein.

On expressways, noise barriers are generally installed to block noise generated by vehicles traveling on them and to prevent the noise from spreading to the surrounding areas. Many of these noise barriers are made of H-shaped steel pillars erected at regular intervals on the roadside or median strip of the road, and are fitted with multiple sound-absorbing panels containing sound-absorbing material between them. Such noise barriers are also installed to block noise generated by noise sources such as railway vehicles traveling on the tracks or factories.

In the above-mentioned type of sound insulation wall, a base plate that is placed on the top surface of the foundation and supports the pillars is usually attached to the lower end of the pillar, and the base plate and the pillars are fixed to the foundation by fixing members such as anchor bolts that penetrate the base plate and are embedded in the foundation. In order to firmly support the pillars, some sound insulation walls have horizontal ribs that extend in the longitudinal direction of the sound insulation panel and vertical ribs that extend in the thickness direction of the sound insulation panel on the top surface of the base plate, and fixing members are embedded in the foundation on the front and back sides of the horizontal ribs (see, for example, Patent Document 1).

Patent No. 4519683

However, in the above-mentioned sound insulation wall support fixing structure, the fixing members that fix the base plate to the foundation are arranged on the front and back sides, sandwiched between the sound insulation panel and the horizontal rib of the base plate, so when inspecting the condition of the fixing members, workers must inspect the sound insulation wall from the front and back sides separately. In particular, in the case of sound insulation walls installed on the roadside of bridges and elevated roads (viaducts), the burden of inspecting the fixing members on the front side (road side) is small, but the inspection of the fixing members on the back side, which is outside the road, must be carried out using an overhead work vehicle such as an over-fence vehicle, which poses a problem of a large workload. Recently, viaducts have also had to be inspected periodically, and there has been a growing demand to reduce the burden of the inspection work.

The present invention aims to make it possible to easily inspect the fixing members that secure the posts in a sound insulation wall that has sound insulation panels between the posts from the front side.

In order to solve the above problems, the sound insulation wall of the present invention comprises pillars erected at a predetermined interval and sound insulation panels provided between the pillars, a base plate fixed to the upper surface of the foundation by a fixing member is attached to the lower end of the pillar, a horizontal rib extending in the longitudinal direction of the sound insulation panel is provided on the upper surface of the base plate, and the fixing member is embedded in the foundation by penetrating the base plate on the front side and the back side, sandwiching the horizontal rib. In this sound insulation wall, the sound insulation panel is provided with an inspection section above the base plate that opens to the front side and bulges to the back side, and an inspection hatch is provided in the bottom wall of the inspection section that opens to the back side of the horizontal rib.

That is, the sound insulation panel of the sound insulation wall is provided with an inspection section that opens to the front side above the base plate that supports the pillars and bulges to the rear side, and an inspection hatch is provided in the bottom wall of the inspection section that opens to the rear side of the horizontal ribs of the base plate. This makes it possible to easily inspect the condition of the fixing members arranged to the rear side of the horizontal ribs (hereinafter referred to as the "fixing members on the rear side") from the front side during inspection work through the inspection hatch in the inspection section of the sound insulation panel.

The sound insulation panel of the present invention is a sound insulation panel that is provided between posts that are erected at a predetermined interval to form a sound insulation wall, and has an inspection section that opens to the front side and bulges out to the rear side above a base plate that is attached to the lower ends of the posts, and an inspection hatch is provided on the rear side of the bottom wall of the inspection section.

In other words, in a sound insulation wall in which sound insulation panels are provided between pillars erected at a specified interval, the base plate attached to the lower end of the pillars has a horizontal rib on its upper surface that extends in the longitudinal direction of the sound insulation panel, and the fixing members that fix the base plate to the upper surface of the foundation are embedded in the foundation by penetrating the base plate on the front and rear sides, sandwiching the horizontal ribs of the base plate. Even in this case, if the sound insulation panel of the present invention is used, the condition of the fixing members on the rear side can be easily inspected from the front side through the inspection hatch of the inspection part of the sound insulation panel during inspection work.

In addition, in the above-mentioned soundproofing panel, if the inspection hatch of the inspection section is configured to be closed by a lid member so that it can be opened and closed, soundproofing can be improved during normal times other than inspection.

As described above, in the present invention, a sound insulation panel used in a sound insulation wall is provided with an inspection section that opens to the front side and bulges to the rear side above the base plate that supports the support columns of the sound insulation wall, and an inspection hatch that opens to the rear side is provided in the bottom wall of the inspection section. Therefore, even if the fixing members that fix the base plate to the foundation are arranged on the front and rear sides, sandwiched between the horizontal ribs on the upper surface of the base plate, during inspection work, workers can easily inspect the condition of the fixing members on the rear side from the front side. In particular, when inspecting sound insulation walls installed on the roadside of an elevated bridge, the burden of inspection work can be significantly reduced compared to the conventional method of inspecting the rear side using an aerial work vehicle.

FIG. 1 is a front view of a sound-insulating panel according to an embodiment; 2A is a cross-sectional view taken along line IIa-IIa in FIG. 1, and FIG. 2B is a cross-sectional view taken along line IIb-IIb in FIG. FIG. 1 is a front view of a main part of a sound insulating wall according to an embodiment of the present invention; 4 is a cross-sectional view taken along line IV-IV of FIG. FIG. 5 is an enlarged cross-sectional view of a main part showing a state during inspection corresponding to FIG. 4. FIG. 3 is a cross-sectional view showing the longitudinal center portion of a modification of the sound-insulating panel, corresponding to FIG. 2(a). FIG. 7 is a cross-sectional view showing one side of the sound insulation panel of FIG. 6, corresponding to FIG. 2(b). FIG. 8 is an enlarged cross-sectional view of a main part showing a state during inspection corresponding to FIG. 7 .

The following describes an embodiment of the present invention with reference to the drawings. Figures 1, 2(a) and 2(b) show a sound insulation panel 1 used in a sound insulation wall of an embodiment described later. The sound insulation panel 1 is a horizontally long rectangle as a whole, and includes a front plate 11 forming the front side, a back plate 12 forming the back side, side plates 13 forming both left and right sides, a bottom plate 14 forming the bottom side, a thick plate-like sound absorbing material 15 stored in the space surrounded by the front plate 11, the back plate 12, both side plates 13 and the bottom plate 14, and a plate-like sealing material 16 covering both side edges of the front plate 11. The front plate 11 is made of an aluminum alloy plate, the back plate 12 is made of a plated steel plate or a laminated steel plate, the side plates 13 and the bottom plate 14 are made of plated steel plate, and the sound absorbing material 15 is made of polyester fiber. In addition, inspection sections 17 that open to the front side and use part of the back plate 12 as the back wall section are formed at the lower part of both sides of the sound insulation panel 1.

The front panel 11 has a number of louver-shaped window holes on the front part 11a other than the opening of the inspection section 17, and has an upper plate part 11b at the upper end that is bent toward the rear side.

The upper part of the rear panel 12a extends parallel to the front part 11a of the front panel 11, and a recess 12b is provided in the center extending in the longitudinal direction of the soundproof panel 1. This recess 12b is provided to improve the overall cross-sectional strength. The lower part of the rear panel 12a has a sloped surface that bulges out linearly diagonally downward from the lower end of the recess 12b, and a portion that extends parallel to the front part 11a of the front panel 11 from the lower end of the sloped surface. The upper end of the rear panel 12 has an upper plate part 12c that is bent toward the front side and is connected to the upper plate part 11b of the front panel 11 by rivets 18 while overlapping it, and an L-shaped notch 12d is provided at both corners of the lower end.

The side panel 13, not shown in the figure, is made up of a member that forms a rectangular portion extending vertically on the side of the soundproof panel 1, and a member that forms a trapezoidal portion that spreads out along the bulge toward the rear side of the back panel 12, and is connected to the front panel 11 with rivets 18 and to the back panel 12 by rivets 18 or spot welding.

The bottom plate 14 is inclined slightly downward from the front side to the rear side, with the downward bent portion on the front side connected to the lower end of the front part 11a of the front plate 11 and the downward bent portion on the rear side connected to a position near the lower end of the rear part 12a of the rear plate 12. In addition, a support member 19 with a cross section of an approximately U-shape is attached to the lower surface of the bottom plate 14 over the entire length of the part other than both sides with a bolt and nut in a position with the opening facing downward. The support member 19 has both legs extending to the same position as the lower end of the rear plate 12 to support the front side of the bottom plate 14, and the legs on the front side form the lower end of the front of the sound insulation panel 1. On the other hand, a gap member 20 with a cross section of an approximately U-shape smaller than the support member 19 is attached to both sides of the lower surface of the bottom plate 14 with the opening facing downward by a rivet not shown in the figure. The gap member 20 is for closing gaps that occur at the lower ends of both sides of the sound insulation panel 1 when the sound insulation panel 1 is installed as described later.

The sound absorbing material 15 is stored in the space surrounded by the front panel 11, rear panel 12, side panel 13, and bottom panel 14, which are all connected together and integrated, except for the inspection section 17. The sound absorbing material 15 used is integrally formed in an inverted convex shape when viewed from the front, but it is also possible to use narrow, short rectangular pieces placed above the inspection sections 17 on both sides, and wide, tall rectangular pieces placed in the center between the two.

The inspection section 17 is partitioned from the rest of the inspection section 17 by an upper bulkhead 17a, which is the upper wall, and a side bulkhead 17b, which is the inner side wall. The sound absorbing material 15 stored inside the rest of the inspection section 17 does not fall into the inspection section 17, ensuring sufficient sound insulation. A rectangular inspection hatch 17c is opened on the rear side of the bottom wall (both sides of the bottom panel 14), and a lid member 21 that closes the inspection hatch 17c is attached with bolts and nuts. The nuts for attaching the lid member 21 are welded to the inner side surface between the legs of the gap member 20.

Figures 3 and 4 show the main parts of an embodiment of a sound insulation wall using the sound insulation panel 1 configured as described above. This sound insulation wall has posts 3 erected at a predetermined interval on the upper surface of the foundation 2, and multiple sound insulation panels 1, 1' are provided between the posts 3.

The pillars 3 are made of H-shaped steel, and a base plate 4 is welded to the lower end of the pillars 3, which is placed on the top surface of the foundation 2. The pillars 3 are fixed to the foundation 2 together with the base plate 4 by anchor bolts 5, which serve as fixing members that penetrate the base plate 4 and are embedded in the foundation 2.

The base plate 4 has on its upper surface a pair of horizontal ribs 4a extending in the longitudinal direction of the sound insulation panel 1 (hereinafter also referred to as "left and right") and a pair of vertical ribs 4b extending in the thickness direction of the sound insulation panel 1 (hereinafter also referred to as "front and back"), with one pair arranged front to back on the left and one pair on the left. The arrangement of each rib 4a, 4b is such that a pair of horizontal ribs 4a is in contact with each of the vertical ribs 4b between the pair of vertical ribs 4b with a gap between them, and there is also a gap between the left and right horizontal ribs 4a. Each horizontal rib 4a extends beyond the side end surface of the base plate 4 to the position of the underside of the base plate 4.

The lower end of the web 3a of the support (H-shaped steel) 3 is placed in the gap between the left and right horizontal ribs 4a, and the lower end of the flange 3b of the support 3 is sandwiched between the left and right vertical ribs 4b, so that the support 3 and the base plate 4 are integrated. The anchor bolts 5 that secure the base plate 4 to the foundation 2 are placed on the front and back sides, sandwiching each pair of horizontal ribs 4a.

The sound insulation panels 1, 1' are arranged such that the sound insulation panel 1 shown in Figs. 1 and 2 is placed in the lowest tier between the supports 3, and the conventional sound insulation panels 1' are stacked on top of it in multiple tiers. The conventional sound insulation panel 1' serves as the base for the sound insulation panel 1 of the embodiment placed in the lowest tier, and does not have an inspection area like the sound insulation panel 1, nor does it have a bulging portion on the back of the back panel, and is entirely filled with sound absorbing material made of the same material as the sound insulation panel 1.

Here, both sides of each soundproofing panel 1, 1' are fitted into the U-shaped cross section of the support columns 3 on both sides. The bottommost soundproofing panel 1 is in a state where the lower ends of both legs of the support member 19 and the lower end of the part of the back panel 12 without the notch 12d abut against the upper surface of the foundation 2 between the base plates 4 on both sides, and one corner of the back side of the base plate 4 fits into the notch 12d of the back panel 12.

At this time, the gap members 20 provided at the lower ends of both sides of the sound insulation panel 1 fit between the pair of horizontal ribs 4a of the base plate 4, thereby closing the gap between the sound insulation panel 1 and the upper edge of the horizontal ribs 4a, thereby improving sound insulation. In addition, the inspection hatch 17c of the inspection section 17 of the sound insulation panel 1 opens above the anchor bolt 5 arranged on the rear side of the pair of horizontal ribs 4a and is closed by a lid member 21.

This sound insulation wall has the above-mentioned structure, and the lowest sound insulation panel 1 is provided with an inspection section 17 that opens to the front side above the base plate 4 that supports the support pillars 3 and bulges to the rear side, and an inspection hatch 17c that opens above the anchor bolts 5 on the rear side is provided in the bottom wall of the inspection section 17. Therefore, during inspection work, as shown in Figure 5, by removing the cover member 21 that closes the inspection hatch 17c, the condition of not only the anchor bolts 5 on the front side but also the anchor bolts 5 on the rear side can be easily inspected from the front side.

Therefore, when this soundproofing wall is installed on the roadside of an elevated bridge, the burden of inspection work can be significantly reduced when inspecting the elevated bridge, compared to the conventional method of inspecting the anchor bolts 5 on the back side using an elevated work vehicle.

6 to 8 show an example in which the structure of the lower side of the sound insulation panel 1 has been modified. In this modification, the bottom plate 14 forming the bottom surface of the sound insulation panel 1 is arranged in a state in which it is inclined slightly downward from the back side to the front side, that is, in a state in which it is inclined in the opposite direction to the example in Figs. 1 to 5, and its front side end is connected to the inward bent part formed at the lower end of the front plate 11, and its rear side downward bent part is connected to the rear part 12a of the rear plate 12. Accordingly, the support member 19 and the gap member 20 arranged on the lower side of the bottom plate 14 are also attached to the bottom plate 14 with their respective upper surface parts inclined in the opposite direction to the example in Figs. 1 to 5. In addition, a plurality of drainage holes 11c are provided along the longitudinal direction of the inward bent part of the front plate 11 in a portion that does not overlap with the bottom plate 14 near the bending position.

In addition, instead of the upper bulkhead 17a of the inspection section 17 in Figures 1 to 5, a receiving member 22 with a roughly U-shaped cross section is provided to support the sound-absorbing material 15 at the top of the inspection section 17. The receiving member 22 has its opening facing upward and its bottom tilted slightly downward from the back side to the front side, with mounting parts 22a formed on both ends of the bottom in the longitudinal direction attached to the side bulkhead 17b and the side panel 13 of the inspection section 17. In addition, a number of drainage holes 22b are provided along the longitudinal direction at the bottom of the receiving member 22 near the bending position on the front side.

As a result, even if rainwater seeps into the soundproof panel 1 through the window holes in the front plate 11, the seeping rainwater flows along the bottom plate 14 or drops from the drainage opening 22b of the receiving member 22, collecting on the front end of the bottom surface, and then drops from the drainage opening 11c of the front plate 11 onto the step on the top surface of the support member 19 and is discharged to the outside. This allows the seeping rainwater to be drained without accumulating inside the soundproof panel 1, preventing corrosion of the internal parts.

Furthermore, in this modified example, the cover member 21 that closes the inspection hatch 17c of the inspection section 17 is made of rubber and has a protrusion 21a formed on the underside that fits around the periphery of the inspection hatch 17c. The cover member 21 can be attached to and detached from the bottom plate 14 simply by passing the inspection hatch 17c while elastically deforming the protrusion 21a. Therefore, in the example of Figures 1 to 5, the cover member 21 is attached to the bottom plate 14 with bolts and nuts, so that opening and closing the inspection hatch 17c (attaching and detaching the bolts for the cover member 21) can be time-consuming when inspecting the anchor bolts 5. However, by using the cover member 21 of this modified example, the inspection hatch 17c can be opened and closed without much effort, and the inspection can be performed more efficiently.

The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not by the meaning described above, and is intended to include all modifications within the meaning and scope of the claims.

For example, in the embodiment, the back surface of the lowest soundproof panel is formed with a bulging portion along the entire length in the longitudinal direction, but it may be made to bulge only at the position of the inspection section.

In the embodiment, a cover member is provided to open and close the inspection hatch of the inspection section of the lowest soundproof panel, but a cover member that can open and close the opening on the front side of the inspection section can also be provided to open and close, improving the appearance from the front side except when the anchor bolts are being inspected.

1, 1' Soundproof panel 2 Foundation 3 Support 4 Base plate 4a Horizontal rib 4b Vertical rib 5 Anchor bolt (fixing member)
11 Front panel 11c Drain port 12 Back panel 13 Side panel 14 Bottom panel 15 Sound absorbing material 17 Inspection section 17c Inspection port 19 Support member 20 Gap member 21 Cover member 22 Receiving member 22b Drain port

Claims (3)

A sound insulation wall comprising: posts (3) erected at a predetermined interval; and sound insulation panels (1) provided between the posts (3) ; a base plate (4) fixed to an upper surface of a foundation (2) by a fixing member (5) is attached to the lower end of the posts (3 ) ; a lateral rib (4a) extending in the longitudinal direction of the sound insulation panel (1) is provided on the upper surface of the base plate (4); and the fixing member (5) is embedded in the foundation (2) by penetrating the base plate (4) on the front side and the back side with the lateral rib (4a) in between,
The sound-insulating panel (1) is provided with an inspection section (17) that opens to the front side above the base plate (4) , and a back plate (12) that forms the back side of the inspection section (17) bulges out toward the rear side above the inspection section (17) relative to the back plate (12) that forms the back side, and covers the space between the inspection section (17) and the base plate (4) on the rear side relative to the fixing member (5);
A sound-insulating wall characterized in that an inspection hatch (17c) is provided in the bottom wall portion of the inspection section (17) and opens on the rear side relative to the horizontal rib (4a) . A sound insulation wall comprising: posts (3) erected at a predetermined interval; and sound insulation panels (1) provided between the posts (3) ; a base plate (4) fixed to an upper surface of a foundation (2) by a fixing member (5) is attached to the lower end of the posts (3 ) ; a lateral rib (4a) extending in the longitudinal direction of the sound insulation panel (1) is provided on the upper surface of the base plate (4); and the fixing member (5) is embedded in the foundation (2) by penetrating the base plate (4) on the front side and the back side with the lateral rib (4a) in between,
The sound-insulating panel (1) is provided with an inspection section (17) that is above the base plate (4) and opens to the front side and bulges to the rear side , and the sound-absorbing material (15) of the sound-insulating panel (1) is supported by an upper partition wall (17a) or a receiving member (22) above the inspection section (17) so as not to fall off.
a bottom wall portion of the inspection section (17) is provided with an inspection hatch (17c) that opens on the rear side of the horizontal rib (4a) , and the inspection hatch (17c) is provided in a bottom plate (14) that connects a front plate (11) and a rear plate (12) of the sound-insulating panel (1) . 3. The sound-insulating panel for use in a sound-insulating wall according to claim 1 or 2, characterized in that an inspection hatch (17c) of the inspection section (17) is closed by a lid member (21) in an openable and closable manner.

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